Simrit 45x65x12 COMBI NBR Simmerring is a COMBI shaft seal from the Cassette & Combi Seal product group. Dimensions: D1 - shaft diameter 45 mm, D2 - outer diameter 65 mm, b - width 12 mm. Sealing material: NBR - Nitrile Butadiene Rubber; catalog specification for this execution: 72 NBR 902, 72 Shore A. The COMBI design is essential when selecting an equivalent; dimensions alone do not confirm interchangeability. Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4. 24h Shipping. Available from stock in Poland for delivery across the EU.
Simrit 45x65x12 COMBI NBR Simmerring is a shaft seal with a COMBI design and exact dimensions 45x65x12 mm. It is designed for a 45 mm shaft, has an outer diameter of 65 mm and a width of 12 mm. The sealing material is NBR - Nitrile Butadiene Rubber. The key technical identifier is the combination 45x65x12 mm + COMBI + NBR.
The product belongs to the COMBI shaft seal family.
Technical identification:
Simrit -> COMBI -> NBR -> 45x65x12 mm
The COMBI designation is important because this construction should not be identified solely by its three nominal dimensions.
When selecting or comparing the seal, the COMBI design must be considered together with the dimensions and material.
D1 - Shaft diameter: 45 mm
D2 - Outer diameter: 65 mm
b - Width: 12 mm
Dimensions: 45x65x12 mm
Design: COMBI
Material: NBR - Nitrile Butadiene Rubber
For this COMBI execution, the third dimension 12 mm is the width b.
All three dimensions should be verified when selecting the seal:
45 mm -> shaft
65 mm -> outer diameter
12 mm -> width
The most important construction feature of this product is:
COMBI
Freudenberg classifies COMBI seals in the:
Cassette & Combi Seal
product group.
A COMBI seal is a multi-component sealing solution. This distinguishes it from a conventional single radial shaft seal.
The COMBI concept combines the shaft sealing function with an integrated running surface / sleeve arrangement, providing a defined sealing system rather than relying solely on a standard radial shaft seal installed directly against the original shaft surface.
For replacement identification, the relevant specification is therefore:
45x65x12 mm + COMBI + NBR
A conventional radial shaft oil seal and a COMBI seal can share the same nominal dimensions while having different constructions.
For this reason, a standard:
45x65x12 mm radial shaft oil seal
should not automatically be considered a replacement for:
Simrit 45x65x12 COMBI NBR
The COMBI construction is part of the technical specification and must be considered during replacement selection.
The confirmed sealing material is:
NBR - Nitrile Butadiene Rubber
NBR is widely used in shaft sealing technology, particularly for applications involving many mineral oils and lubricating greases.
For replacement selection, the material should be considered together with the seal construction:
COMBI + NBR
Material compatibility must always be checked against the actual operating medium and conditions.
Freudenberg catalog data for the 45x65x12 COMBI NBR execution specify the material compound:
72 NBR 902
with hardness:
72 Shore A
This provides a more precise material definition than the generic designation NBR.
When exact material equivalence is required, the compound specification should therefore be checked in addition to the basic dimensions and COMBI construction.
Matching dimensions alone do not prove interchangeability.
When comparing another seal with Simrit 45x65x12 COMBI, verify:
Shaft diameter: 45 mm
Outer diameter: 65 mm
Width: 12 mm
Design: COMBI
Material: NBR
Compound where required: 72 NBR 902
Hardness where required: 72 Shore A
The most important distinction is the COMBI construction.
Start with the complete identification:
Simrit 45x65x12 COMBI NBR
Do not select a replacement using only:
45x65x12 mm
A technically appropriate equivalent should match the required dimensions and correspond to the COMBI sealing concept.
Material compatibility and the requirements of the actual installation should also be verified.
If additional markings are visible on the removed seal, they should be used as additional identification data.
Brand: Simrit
Product type: Shaft seal / Simmerring
Product group: Cassette & Combi Seal
Design: COMBI
Dimensions: 45x65x12 mm
D1 - Shaft diameter: 45 mm
D2 - Outer diameter: 65 mm
b - Width: 12 mm
Material: NBR - Nitrile Butadiene Rubber
Compound: 72 NBR 902
Hardness: 72 Shore A
The seal measures 45x65x12 mm: 45 mm shaft diameter, 65 mm outer diameter and 12 mm width.
It is a COMBI shaft seal, belonging to the Cassette & Combi Seal product group.
COMBI identifies the sealing system design. It is a multi-component sealing construction and should not be treated as a generic radial shaft oil seal based only on its dimensions.
The sealing material is NBR - Nitrile Butadiene Rubber. Catalog data for this dimensional COMBI execution specify the compound 72 NBR 902.
The catalog specification for the corresponding 72 NBR 902 compound is 72 Shore A.
Not automatically. Matching dimensions do not confirm interchangeability. The replacement must also correspond to the required COMBI construction, material and installation conditions.
45 mm is the shaft diameter, 65 mm is the outer diameter and 12 mm is the seal width.
The primary product identification is:
Simrit 45x65x12 COMBI NBR Simmerring
For technical comparison, use:
45x65x12 mm + COMBI + NBR
Simrit 45x65x12 COMBI NBR Simmerring is a COMBI shaft seal from the Cassette & Combi Seal product group. It has a 45 mm shaft diameter, 65 mm outer diameter and 12 mm width. The sealing material is NBR, with catalog data for this execution specifying 72 NBR 902 and 72 Shore A.
Data sheet
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Simrit 45x65x12 COMBI NBR Simmerring is a COMBI shaft seal from the Cassette & Combi Seal product group. Dimensions: D1 - shaft diameter 45 mm, D2 - outer diameter 65 mm, b - width 12 mm. Sealing material: NBR - Nitrile Butadiene Rubber; catalog specification for this execution: 72 NBR 902, 72 Shore A. The COMBI design is essential when selecting an equivalent; dimensions alone do not confirm interchangeability. Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4. 24h Shipping. Available from stock in Poland for delivery across the EU.
